Primer.



F. 0 KILGORE.

PRIMER.

APPLICATION FILED FEB-16.1916.

Patented May14,1918.

H In veniori Wai /Mk4 Q 2&1. ae MMM UNITED STATES PATENT OFFICE.

FREDERICK O. KILGORE, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO SPRAY PRIMER COMPANY, BOSTON, MASSACHUSETTS, A. CORPORATION OF MASSA- cHUsE'r'rs. I

. tion with the accompanying drawings, is

' suction stroke.-

a specification, like characters on the drawings representing like parts.

o This invention relates tov an apparatus for priming internal combustion motors, and has for its object to provide a simple, eificient and inexpensive apparatus, which is especially applicable to automobiles,-motor cycles, motor boats and the like- The apparatus consists essentially of .a pump provided with a cylinder having a fluid inlet port and a fluid outlet port, said ports being controlled by valves which automatically respond to the movement of the piston in said cylinder. Provision is also made for positively moving one and preferably both of said valves, so as to insure that the said valves are unaffected by the suction of the motor, as will be described. Provision is made for automatically moving said piston on its suction stroke so as to maintain a charge of gasolene or other motive fluid in the pump cylinder when the apparatus is not being used, as will be described. I 1

These and other'features of this invention will be pointed out-in the claims at the end ofthis specification.

Figure 1 representsa portion of an automobile provided with a priming apparatus embodying this invention.

Fig. 2, a longitudinal section of the ap para-tus with the parts in the position they occupy when the piston is at the end of its Fig. 3, a like section with the parts in the position they occupy when the piston is at the end of its forcing stroke.

Fig. 4:, a detail in section with the valves in the position they occupy at thebeginning of the suction stroke of the piston; and I Figs. 5 and 6, details to be referred to.

Referring to the drawings, a represents the cylinder of a pump, which is provided at one end with the head I) and at its Specification of Letters Patent.

PRIMER.

Application filed February is, 1916. Serial No. 78,747.

opposite end with a head a, which has cast integral with it a hollow boss d extended diametrically across the head 0. low boss at cooperates with the head 0 to form chambers 10, 12, which will be referred to as the inlet and outlet valve chambers.

The inlet valve chamber 10 contains within it an air inlet valve 13, whichlis herein shown as a disk of leatheror other suitable material, which cooperates with the mouth of a fluid inlet port or passage 14:, extended through a nipple 15, which has its inner end in threaded engagement with the walls of the chamber 10, and has its outer end externally threaded so as to be engaged by a nut 16, by means of which the fluid The holsupply pipe 17 is detachably secured to the nipple 15. The outlet valve chamber 12 contains an outlet valve 20, herein shown as a disk of leather or other suitable ma? terial, which cooperates with the mouth-of a fluid outlet port or'passage 22, extended through a nipple 23, which is in threaded engagement with the walls of the chamber 12 and has its outer end externally threaded to be engaged by a nut 24, by means of which the fluid outlet pipe 25vis detachably securedto the nipple 23. Fluid tight joints d and also to be positively closed and held in their closed positions.

In the present instance, I have shown one construction for accomplishing these results.

To this end I employ two movable devices 31, 32, located in the valve chambers ,10, 12, and preferably made as cylindrical blocks having on their inner ends concaved grooves 33, 34, with which coperates a cone 35fast on a rod 36, which forms an extension of the piston rod 37 for the piston 38.

The movable block 32 carries the outlet valve 20, and in the present instance the said valve is fitted into a recess in the upper or outer end of the said block.

The block 32 is forced in one directionin the valve chamber 12 by, a spring .40 interposed between said block and the nipple 23, and said spring keeps the inner or under surface of the block 32 in engagement with either the rod 36 or the cone 35 as will be described.

The lower block 31 is provided on its inner or upper surface with the conical groove 33, which cotiperates with the cone 35, and its lower or under surface has interposed between it and the inlet valve 13, a spring 41, which is shown as extended into a ocket 42in the under or outer surface of the block 31 and said spring acts to seat the inlet valve 13 and also to keep the block 31 'in engagament with the rod 36 or the cone 35 as will be described.

The spring 41 is made sufficiently light to enable the inlet valve 13 to be lifted from its seat on the suction stroke ofthe piston 38ers represented in Fig. 4. The cone-carrying rod '36- is made of a suitable length to permit the piston 38 to travel a portion of its suction stroke in the direction indicated by the arrow 43, Figs. 2 and 3, before the cone is brought into engagement with the conical grooved surfacesof the blocks 31, 32, and on further movementof thepiston on-its suction stroke, the cone separates the blocks and moves them from substantially the position shown in Fig. 3, to that shown in Fig. 2, with the result that the inlet valve 13 is forced to its seat and is positively closed, and the outlet valveis forced to its seat, and is positively closed, as represented in Fig. 2.

The condition of the apparatus represented in Fig. 2 is what may be-termed its normal condition with the cylindera filled with gasolene or other motive-fluid.

When it is desired to use the apparatus, the piston 38 i forced from the position shown in Fig. 2 to substantially that shown in Fig. 3, and as the piston'is moved on its forward stroke, the cone 35 is withdrawn from between the'blocks- 31, 32, and the latter are permitted to bemoved inthe valve chambers by the springs 41, '40.

The spring 41 moves the block 31 toward the block 32 until the movementis arrested by the rod 36, and while this action. is taking place, the inlet, valve is kept closed by the pressure ofthe-gosolene in front of the piston 38 assisted by the spring 41.

The spring 40 moves the block 32 toward the block 31 and removesthe outlet valve 20 from its seat, thereby opening the outlet valve as shown in Fig. 3 and allowing a free passage for the gasolene from the cylinder a to the outlet pipe 25 through the port 50, valve chamber 12, and passage22 in the nipple 23.

On the return stroke of thepiston in the direction indicated by the arrow 43, the suction created by the piston lifts the inlet valve 13 from its seat, as represented in Fig. 4, and draws gasolene or other motive fluid from the supply pipe 17 through the passage 14 into chamber 10 and thence through the port 51 into the cylinder. At or nearthe end of the suction stroke of the piston 38,

the cone 35 is engaged with the conical grooves in the sliding blocks 31, 32, and moves the latter away from each other, so that when the piston has reached the end of its suction stroke and the cylinder a is filled with priming fluid, the sliding blocks will have been moved into position topositively close the inlet and outlet valves and especially the outlet valve '20, as the-motor 53 with which the outlet pipe 25 is connected is rendered powerless to draw fluid from the pump cylinder a. The outlet valve 20 is attached to themovable block 32 and is engagedwith its seat by movement of said block, whereas the inlet valve is seatedby the block 31, andit will be noticed that the valves are locked or maintained in their closed position by the cone 35 as long as the piston 38 is at rest at the, end of its suction stroke. As a result, the motor is powerless to draw gasolene from the. cylinderor from the inlet pipe 17 through-the cylinder while the priming apparatus: is not being used.

When the piston 38 is moved on its pressure stroke, the .cone 35 is moved into a chamber'54 formed by a cylinder 55, which is closed at its outer end and is in threaded engagement with a hollow boss 56 forming part of the walls of the valve chambers 10, 12.

The piston 38 is moved on its suction stroke. by a spring 156,- which is locatedin a hollow boss 57 extended from thefront head I) of the pump cylinder, and which is made of sufficient length ;to be extended through the dasher 58 of an automobile 59,

The outlet pipe25 is connected with the manifold of the motor. 53, and the inlet pipe 17 is connected withthesupply pipe 68 for thecarbureter-69 at a point between the latter and the supply tank 70. The

piston 38 may and preferably Iwillbe made as herein shown andconsistsof two cupped washers 71, '(2, of leather or other suitable material, which are mounted. on the piston and nut, 77. I ably soldered to'the piston rod ,to prevent rod back to back and have their circumferby sheet metal disks 73, which are slitted at their circumferences to form spring fingers 74, and said disks and washers are clamped on the piston rod 86 between a metal disks? 5 fast thereon, and a washer 76 The metal disk 7 5 is preferleakage of gasolene along the said rod.

In operation with the primer applied to the dasher of an automobile. as shown in Fig. 1, the operator or driver of the car has only to push upon the head 62 of the piston rod when, he desires to prime the motor, and after he removes his foot from the head 62, the spring 156 returns the piston to its normal position shown in Fig. 2, which movement of the piston not only fills the cylinder of the pump with gasolene but also positively closes the outlet valve and thereby prevents the suction of the motor from emptying the pump cylinder of its charge of gasolene.

I have hereinshown one construction of apparatus for priming motors in which the outlet valve is automatically opened on the discharge stroke of the pump piston and vpositively closed on the suction stroke of said piston, but it is not desired to limit the invention to the particular construction herein shown.

Claims:

1. In an apparatus of the character described, in combination, a pump cylinder provided at its front and rear ends with heads, a hollow boss extended transversely across one of said heads and forming valve chambers, nipples detachably secured to said hollow boss and provided with passages forming a fluid inlet and a fluid outlet for said valve chambers, valves in said chambers, sliding blocks in said valve chambers movable toward and from each other and provided on their adjacent ends with conical grooves, a piston movable in said cylinder and provided with a piston rod having an extension extended between said sliding blocks, and a cone on said extension cooperating with the conical grooves of said sliding blocks to move the latter away from each other on the suction stroke of said piston and effect a positive closing of the said valves.

2. In an apparatus of the character described, in combination, a pump cylinder provided at one end with valve chambers, fluid inlet and outlet valves located in said chambers, devices movable in said valve chambers and cooperating with said valves to close the same, a piston in said cylinder, a cone attached to said piston to move therewith and cooperating with said devices to effect a closing of said valves when the said piston is moved on one stroke and to permit said valves to be opened when the piston is moved on its strokein an opposite direction.

3. In an apparatus of the character described, in combination, a pump cylinder provided at one end with a fluidinlet and with a fluid outlet, valves controlling said fluid inlet and outlet, a piston in said pump cylinder, and means attached to said piston and cooperating with said fluid outlet valve to close the latter on the suction stroke of said piston.

4.,In an apparatus of the character described, in combination, a pump cylinder provided at one end with a fluid inlet and with a fluid outlet, valves to control said fluid inlet and outlet, a piston in said cylinder, a spring to move said piston on its suction stroke, and means movable within said cylinder with said piston to positively close provided with a fluid inlet and with a fluid outlet, a piston in said cylinder, a valve for controlling said fluid outlet automatically opened on the discharge stroke of said piston, and means attached to said piston within the cylinder for positively closing said outlet valve on the suction stroke of said piston.

6. In an apparatus of the character described, in combination, a cylinder, a valve chamber communicating therewith, a valve in said chamber controlling the passage of fluid from said cylinder, a device movable in said valve chamber and cooperating with said valve to move the same, a piston in said cylinder having its piston rod extended into said valve chamber, and means mrovable with said piston rod and cooperating with said device for eflecting a closing of said valve when the piston is moved in one direction.

7. In an apparatus of the character described, in combination, a cylinder, a valve chamber communicating therewith, a valve in said chamber, a piston in said cylinder, having its piston rod extended into sald valve chamber, a device cooperating with said valve and movable laterally with relation to said piston, means movable with the piston rod and cooperating with said device for positively closing said valve and maintaining it closed until the piston is moved.

8. In an apparatus of the character de scribed, in combination, a cylinder, a valve chamber communicating therewith, a valve in said chamber, a piston in said cylinder, a device cooperatingwith said valve and movable laterally with relation to said piss ton, and means movable with the piston and coiiperating with said device for positively closing said valve and for maintaining it closed by movement of the piston in one direction and to permit said valve to be opened by movement of the piston in the opposite direction.

9. In an apparatus'of the character described, in combination, a cylinder provided at one end with a fluid inlet and a fluid outlet, valves controlling said inlet and outlet, a piston in said cylinder, a device cooperating with one of said valves and movable laterally with relation to said piston, and means movable With the piston and cooperating with said device for positively closing one of said valves and for maintaining it closed.

10. In an apparatus of the character described, in combination, a cylinder provided at one end with a fluid inlet and a fluid outlet, valves controlling said inlet and outlet, a piston in said cylinder, devices cooperating with said valves and movable laterally with relation to said piston, and means movable with the piston and cooperating withsaid' devices for positively closing both of said valves and for maintaining them closed.

' 11. In an apparatus of the character de scribed, in combination, a. cylinder pro-' cylinder, a valve cooperating with said fluid outlet'and means operatively connected with said piston withinsaid'cylinder to be positively moved by said piston to close" said outlet on the suction stroke of saidpiston.

In testimony whereof, I have signed my name to this specification.

FREDERICK o. KILGORE."

Copies of this patent may be obtained for five cents each, by addressing the coi'ninissioner of Patents,

Washington, DIG. 

